请帮助我,
这是我的 DAO,它给了我正确的行数,但我想添加一些条件。
@Override
public int getAllRows(SearchForm searchForm) {
logger.info("SearchForm Detail :: " + searchForm);
Session session = this.sessionFactory.getCurrentSession();
Query query = (Query) session.createQuery(" select count(*) from EmployeeVO");
int rows = ((Number) query.uniqueResult()).intValue();
logger.info("Number of Rows :: " + rows);
return rows;
}
这是我的MySQL查询:
选择first_name
从员工
哪里first_name LIKE '%ab%'
和工资>0,工资<100000;
Query query = (Query) session.createQuery("SELECT first_name FROM employees WHERE first_name LIKE ? AND salary > ? and salary < ?");
query.setParameter(0, '%ab%');
query.setParameter(1, 0);
query.setParameter(2, 100000);
您还可以使用命名参数,如下所示:
Query query = (Query) session.createQuery("SELECT first_name FROM employees WHERE first_name LIKE :first_name AND salary > :min_salary and salary < :max_salary");
query.setParameter(first_name, '%ab%');
query.setParameter(min_salary, 0);
query.setParameter(max_salary, 100000);
另一种方法是使用 Hibernate Criteria API:
Criteria criteria = session.createCriteria(Employee.class);
criteria.add(Restrictions.eq("first_name", "%ab%"));
criteria.add(Restrictions.lt("salary ", 0));
criteria.add(Restrictions.gt("salary ", 100000));
List list = criteria.list();